The weakest castle in Heroes of Might and Magic IV!

Yes, she may not stand out (and it's not about the map size at all)... But in my opinion, this is a sign of stability. Life can easily adapt to any map and situation. This is a plus, while Death is really too strong only on a huge map thanks to its Necromancy. Although, again, it's debatable... Life (and Nature, and Haven, by the way) also benefits from large maps. Don't underestimate Resurrection (and especially Summoning).